I have this cable.... I have never seen anything more ingenious. I would also pay 500. But I was lucky.
Lian Li are not keeping up with production.
This does not surprise me. But always buy the mainboard cable first, because in it is also the controller where you can then also plug in the GPU cable.
It also works without, but the effects are NOT comparable.
It is simply meeeega hot. A real hit for nerds like me.
Dee